Experimental and numerical study of particle resuspension on turbine surface with film cooling

IF 3.2 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Progress in Nuclear Energy Pub Date : 2026-04-01 Epub Date: 2026-02-03 DOI:10.1016/j.pnucene.2026.106285

Xiaozhong Wang , Qi Sun , Wei Peng , Yinhai Zhu , Peixue Jiang , Suyuan Yu

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Abstract

Resuspension significantly influences the transport and deposition of graphite particles within the turbine of high-temperature gas-cooled reactor (HTGR). This work involved setting up a visualized experimental setup to observe particle resuspension under film cooling conditions. High-speed cameras and hot-wire anemometers were employed to measure the dynamic process of particle resuspension and the characteristics of the near-wall flow field. Based on the torque balance model, a particle resuspension model suitable for the HTGR turbine conditions was developed, and the accuracy of the model was verified with experimental results. Combining experimental measurements and numerical simulations, the mechanism by which film cooling affects particle resuspension was investigated, and the dominant role of counter-rotating vortices was revealed. Furthermore, the influence of key factors such as flow velocity, blowing ratio, and particle size on resuspension characteristics was systematically analyzed. Finally, the particle deposition process and resuspension process were coupled for analysis, and the distribution characteristics of particle deposition on the turbine surface under film cooling conditions were studied. The findings from this study not only offer experimental insights into particle resuspension behavior but also contribute valuable guidance for the design and safety assessment of HTGR helium turbines.

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气膜冷却涡轮表面颗粒再悬浮的实验与数值研究

重悬浮对高温气冷堆（HTGR）涡轮内石墨颗粒的迁移和沉积有重要影响。这项工作包括建立一个可视化的实验装置来观察膜冷却条件下的颗粒再悬浮。采用高速摄像机和热线风速仪测量了颗粒重悬浮的动态过程和近壁流场特征。在转矩平衡模型的基础上，建立了适用于HTGR涡轮工况的颗粒重悬浮模型，并用实验结果验证了模型的准确性。结合实验测量和数值模拟，研究了气膜冷却对颗粒重悬浮的影响机理，揭示了对旋涡的主导作用。系统分析了流速、吹气比、粒度等关键因素对再悬浮特性的影响。最后，对颗粒沉积过程和重悬浮过程进行耦合分析，研究了气膜冷却条件下涡轮表面颗粒沉积的分布特征。该研究结果不仅为粒子再悬浮行为提供了实验见解，而且为HTGR氦涡轮的设计和安全性评估提供了有价值的指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Progress in Nuclear Energy 工程技术-核科学技术

CiteScore

5.30

自引率

14.80%

发文量

331

审稿时长

3.5 months

期刊介绍： Progress in Nuclear Energy is an international review journal covering all aspects of nuclear science and engineering. In keeping with the maturity of nuclear power, articles on safety, siting and environmental problems are encouraged, as are those associated with economics and fuel management. However, basic physics and engineering will remain an important aspect of the editorial policy. Articles published are either of a review nature or present new material in more depth. They are aimed at researchers and technically-oriented managers working in the nuclear energy field. Please note the following: 1) PNE seeks high quality research papers which are medium to long in length. Short research papers should be submitted to the journal Annals in Nuclear Energy. 2) PNE reserves the right to reject papers which are based solely on routine application of computer codes used to produce reactor designs or explain existing reactor phenomena. Such papers, although worthy, are best left as laboratory reports whereas Progress in Nuclear Energy seeks papers of originality, which are archival in nature, in the fields of mathematical and experimental nuclear technology, including fission, fusion (blanket physics, radiation damage), safety, materials aspects, economics, etc. 3) Review papers, which may occasionally be invited, are particularly sought by the journal in these fields.